1980 732 Engine Questions

[802C4T]

1: my engine seems to have two air filters. The pictures I find online all only show one. Could this have to do with it being converted to propane? 2: I'm assuming if I drop the chain case that I need to support the pumps with something like a gantry, am I correct that they don't have anything under them for support other than the chain case? 3: I can't seem to see or locate a radiator overflow tank - does anyone have a picture as to where it's supposed to be in the engine bay?

 

[flyerdan]

Bobcat (and many other manufacturers) used that same style of air cleaner assembly on a lot of models, some had an interior filter. The big filters have different part numbers, I would guess that the ones with an inner filter are a bit coarser so the overall vacuum will be the same. It's usually the diesel engines that have the dual stage filter.
Probably the best thing to do would be get a 743 book from the manual thread re: dropping the chaincase. I don't think there is one for the 732, but the architecture should be similar and it will outline the steps and precautions.
You should be able to follow the overflow hose from the radiator to the overflow tank. Bobcat Parts Online show that the overflow kit was an option, so it's possible that it never had it.

 

[spitzair]

Flyerdan is correct, the architecture of the 730 series machines is essentially the same as the 740 series, the biggest difference being the 40 series machines have a tilt-up cab whereas the 30 series don’t. I believe (but have never done this myself) that yes you can drop the chain case and support the pumps from the main structure with a beam or gantry. There are a few other minor differences such as muffler location and coolant overflow tank location. On the 40 series machines the overflow tank is in the right side of the engine compartment, whereas on the 30 series machines such as your 732 this is right beside where we will find your muffler so with the heat from the muffler right there the plastic tank wouldn’t last very long... The coolant overflow tank on the 30 seris machines is actually mounted between the back of the cab and the engine room above the gas tank. On the 40 series machines when they moved the expansion (or coolant overflow) tank into the engine compartment they made more room available behind the cab for the fuel tank so the 40 series machines also have a substantially bigger fuel tank. I’ve never seen the dual air cleaners though but I suspect you’re right in that it was probably done with the propane conversion.